US NAVY'S - Incat

NO RESTING ON LAURELS: MAN DIESEL IS ALREADY
DEVELOPING THE TECHNOLOGIES WHICH WILL BUILD
ON THE FAVOURABLE CONSUMPTION AND EMISSIONS
OF THE 28/33D HIGH POWER DENSITY ENGINE.
by obligations to reduce emissions of the greenhouse gas
carbon dioxide (CO2). Since CO2 emissions are directly
proportional to fuel consumption, the engine developer’s
challenge is now to reduce harmful emissions without
increasing fuel consumption or, in the best case, reduce
both simultaneously.
“A major challenge is emissions of oxides of nitrogen
(NOx), which are always a special focus of legislation
affecting large marine diesel engine emissions”, notes Dr.
Franz Koch, Vice President, Diesel Engines at MAN Diesel
in Augsburg, Germany, where the 28/33D is built.
Nitrogen makes up 4/5 of the air around us but is
very unreactive at ambient temperatures. However,
it combines readily with oxygen – the other 1/5 of the
atmosphere - at the temperatures and pressures reached
in a diesel combustion chamber. Outside the combustion
the NOx formed and emitted is instrumental in the
formation of low level ozone, acid rain and the overfertilising
the land and the sea.
“The immediate target for engine builders is IMO Tier
2, the latest directive from International Maritime
Organisation which comes into force in 2011 and specifies
a considerable NOx reduction vis-à-vis Tier 1,” Koch
confirms.
Incat THE Magazine Issue 36 19